Your right, many times there is an underlying reason. But, as far as my son's and daughter goes, often times it is a battle of wills. Also, maybe I am extremely strict, but I believe that there are some behaviors that are unacceptable REGARDLESS of how sleepy, hungry, or bored they get. For instance, running into the street, throwing themselves on the floor and having a fit. I teach my children very early, say at about a year, how to ask for things. Now of course a 12 month old can't verbally ask, but they all knew at that age how to point, and then I would say please and put my hand out nicely. They all learned within a very short time, how to ask. Maybe you are blessed. But my oldest would not stay in a time out at 2, and his babysitter tried to physically hold him in one, he bit her and drew blood. My middle son doesn't care if he is in a time-out, he has quite the imagination and after being released will tell you all about his dinosaur buddies who visited him the corner. He will actually place himself in secluded places because he doesn't like being in a loud or chaotic space. My daughter is the only one that time-outs affect, and we do use them with her simply because they have a larger effect on her than a spanking.